
Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Detects arc flash events via light sensors for rapid tripping.
- Universal supply (100-240 Vac/Vdc) for flexible integration.
- Accepts two optical sensors (point or fiber-optic) in any combination.
- Two isolated Form-C contacts for tripping multiple devices.
- Fail-safe system with continuous sensor health monitoring.
Specifications
Application | NA |
Brand Name | Littelfuse |
Special Features | dual sensor inputs with adjustable light sensitivity |
Standard | UL, CE, RCM |
Sub Brand | AF0100 Series |
Type | Protection Relay |

1-1393143-3
Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10
1-1393143-6
Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10
SCP102D24X-C02
IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pairFrequently Asked Questions
What is the detection time for Littelfuse Arc-Flash Relays?
The PGR-8800 and AF0500 relays can detect an arcing condition and send a trip signal to the circuit breaker within 1 ms. The AF0500 reaction time is between 3-8 ms.
What are the input voltage ranges for the AF0100 relay?
The AF0100-00 model supports 100–240 V ac/V dc and 24–48 V dc, while the AF0100-10 model supports 24–48 V dc.
What are the dimensions of the AF0100 Arc-Flash Relay?
The AF0100 Arc-Flash Relay has dimensions of H 90 mm (3.5”), W 128 mm (5.0”), D 60 mm (2.4”).
What types of sensors are available for Littelfuse Arc-Flash Relays?
Two types of light sensors are available: point sensors (PGA-LS10) and fiber-optic sensors (PGA-LS20/PGA-LS30).
What is the warranty period for the PGR-8800 and AF0500 relays?
Both the PGR-8800 and AF0500 Arc-Flash Relays come with a 5-year warranty.
What is the trip coil output speed for the AF0100 relay?
The AF0100 Arc-Flash Relay has a trip coil output speed of less than 5 ms (typical).
Does the PGR-8800 relay have redundant trip paths?
Yes, the PGR-8800 has two internal trip paths: a primary microprocessor trip path and a backup analog trip path for added reliability.
What is the maximum cable length for the sensors?
The electrical cable for both point and fiber-optic sensors is 10 m (32.8 ft) included, expandable to 50 m (164 ft).
What are the input voltage options for the PGR-8800 relay?
The PGR-8800 relay accepts input voltages of 100–240 V ac, 110–250 V dc, or 14–48 V dc.
Can arc-flash relays lower the required PPE category?
Yes, by reducing the incident energy through faster clearing times, arc-flash relays can help lower the PPE category, but the final determination depends on the electrical system.
Frequently Asked Questions about Littelfuse
What certifications and standards do Littelfuse products comply with?
Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.
What industries and applications are Littelfuse products used for?
Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.
What technical support does Littelfuse offer?
Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.
What are the main product lines offered by Littelfuse?
Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.
What are the key features of Littelfuse products?
Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.
What environmental ratings do Littelfuse products have?
Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.
What accessories are available for Littelfuse products?
Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.
What is Littelfuse's warranty policy?
Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].
What communication protocols do Littelfuse products support?
Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.
How are Littelfuse products typically installed?
Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.


















